feat: kavenegar sdk, otp generation and verifying

internal/repository/cache/otp_repo.go

@@ -7,6 +7,8 @@ import (
 	"encoding/json"
 	"fmt"
 	"time"
+
+	"github.com/redis/go-redis/v9"
 )
 
 type OTPRepository struct {
@@ -27,7 +29,7 @@ func (r *OTPRepository) Create(ctx context.Context, phone string, otp *domain.OT
 		return fmt.Errorf("failed to marshal otp: %w", err)
 	}
 
-	ttl := time.Until(otp.ExpiredAt)
+	ttl := time.Until(otp.ExpiresAt)
 	if ttl <= 0 {
 		return fmt.Errorf("OTP expired already")
 	}
@@ -48,6 +50,30 @@ func (r *OTPRepository) Delete(ctx context.Context, phone string) error {
 	return nil
 }
 
+func (r *OTPRepository) Get(ctx context.Context, phone string) (*domain.OTP, error) {
+	key := r.getOTPKey(phone)
+
+	result, err := r.redis.Client().Get(ctx, key).Result()
+	if err != nil {
+		if err == redis.Nil {
+			return nil, fmt.Errorf("otp code not found")
+		}
+		return nil, err
+	}
+
+	var otp domain.OTP
+	if err := json.Unmarshal([]byte(result), &otp); err != nil {
+		return nil, err
+	}
+
+	if otp.IsExpired() {
+		r.Delete(ctx, phone)
+		return nil, fmt.Errorf("otp is expired")
+	}
+	return &otp, nil
+
+}
+
 func (r *OTPRepository) getOTPKey(phone string) string {
 	return fmt.Sprintf("challenge:%s", phone)
 }